ZIP code 92603

Orange County, including Irvine

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Report created October 31, 2026 at www.firezones.org/zip/92603

Summary

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    1. Very High 3,271 acres · 3 state, 3,268 local 51%
    2. High 1,971 acres · Local Responsibility Area 31%
    3. Moderate 333 acres · Local Responsibility Area 5%
    4. Non-wildland 818 acres · Local Responsibility Area 13%

    6,392 acres of land in all, 3 in the State Responsibility Area and 6,389 in the Local. State zones are the ones the State Fire Marshal designated, in effect since April 1, 2024. Local zones are CAL FIRE's 2025 recommendation, which each city or county adopts by ordinance and can make stricter. How to read fire zones

  • Fire history

    Fires CAL FIRE has recorded here

    1. 1993 Laguna Fire 14,338 acres in total · Cause: Arson 3,859 acres here
    2. 2001 Shady Canyon Fire Cause: Power lines 26 acres here
    3. 2002 Shady Canyon Fire Cause: Power lines 3 acres here
    4. 2021 Bonita Fire Cause: Vehicle 1 acre here

    The most recent was the 2021 Bonita Fire, which burned 1 acre here. In all, 3,859 acres of ZIP code 92603 have burned. Acres are the land each fire burned here, and fires that crossed less than an acre are not counted. Some older or smaller fires may be missing, and a fire perimeter can include unburned patches. How to read fire history

Nearby areas

Communities in ZIP code 92603

Neighboring ZIP codes

  1. 92603 51% Very High · this area
  2. 92612 34% High · 3% Very High
  3. 92617 1% Moderate · <1% High
  4. 92618 28% Very High
  5. 92651 93% Very High
  6. 92657 80% Very High
  7. 92660 1% Moderate · 1% High

Sources

Fire hazard severity zones
CAL FIRE Office of the State Fire Marshal
State map published June 27, 2025, local map February 2, 2026
Fire history
CAL FIRE Fire and Resource Assessment Program
Published July 28, 2026

This site is independent and not affiliated with CAL FIRE, so for an official determination, check with the agency or your city or county. How we read the data